	    	function keyDown(event){
    		event=event ||window.event;
    		if((event.keyCode ==65 )&&(event.altKey)){
    		
				    		chrome.extension.sendRequest({greeting: "hello"}, function(response) {
								  console.log(response.farewell);
								});
    			}
    		}
    	document.onkeydown=keyDown;